package com.layne.utils;

import org.apache.commons.codec.digest.DigestUtils;
import org.springframework.stereotype.Component;

/**
 * MD5 工具类
 *
 * @author layne
 */
@Component
public class MD5Utils {

    public static String md5(String src){
        //加密后的字符串
        return DigestUtils.md5Hex(src);
    }

    public static final String salt = "1a2b3c4d";

    /**
     * 第一次加密
     * @param inputPass 输入的密码
     * @return
     */
    public static String inputPassToFormPass(String inputPass){
        //相当于salt.charAt(0) = 1    str = 12 + inputPass + c3
        String str = ""+salt.charAt(0)+salt.charAt(2)+inputPass+salt.charAt(5)+salt.charAt(4);
        return md5(str);
    }

    public static String formPassToDBPass(String formPass, String salt){
        String str = ""+salt.charAt(0)+salt.charAt(2)+formPass+salt.charAt(5)+salt.charAt(4);
        return md5(str);
    }

    public static String inputPassToDBPass(String inputPass, String salt){
        String formPass = inputPassToFormPass(inputPass);
        String dbPass = formPassToDBPass(formPass, salt);
        return dbPass;
    }

    public static void main(String[] args) {
        //d3b1294a61a07da9b49b6e22b2cbd7f9
        System.out.println(inputPassToFormPass("123456"));
        System.out.println(formPassToDBPass("d3b1294a61a07da9b49b6e22b2cbd7f9","1a2b3c4d"));
        System.out.println(inputPassToDBPass("123456","1a2b3c4d"));

    }

}
